When traveling to North India earlier this month I came across this at the back of a truck. Most trucks, or at least a lot of them, especially in the North, have some or the other one-liner at the back. This one says, "apno se bacho, gairon se nipat lenge". Loosely translated, this means, "beware of your own, strangers we will take care of".
The most profound pearls of wisdom can come from the unlikeliest of places.